1920126388 has 12 divisors (see below), whose sum is σ = 3506317920. Its totient is φ = 918321272.

The previous prime is 1920126379. The next prime is 1920126389. The reversal of 1920126388 is 8836210291.

It is a self number, because there is not a number n which added to its sum of digits gives 1920126388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920126389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10435378 + ... + 10435561.

It is an arithmetic number, because the mean of its divisors is an integer number (292193160).

Almost surely, 2^1920126388 is an apocalyptic number.

It is an amenable number.

1920126388 is a deficient number, since it is larger than the sum of its proper divisors (1586191532).

1920126388 is a wasteful number, since it uses less digits than its factorization.

1920126388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20870966 (or 20870964 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1920126388 is about 43819.2467758176. The cubic root of 1920126388 is about 1242.9202737902.

The spelling of 1920126388 in words is "one billion, nine hundred twenty million, one hundred twenty-six thousand, three hundred eighty-eight".